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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 891 · 40 questions
TalentJR

How to do it in your head (Make 10): Bonds to 10: 1 + 9, 2 + 8, 3 + 7, 4 + 6, 5 + 5. Bonds to 100: the ones make 10, and the tens make 9 (because the ones already gave one ten). If the number ends in 0, the tens make 10: 40 + 60 = 100.

NameDateTime takenScore ___ / 40
  1. 1.9 + ? = 10
  2. 2.85 + ? = 100
  3. 3.4 + ? = 10
  4. 4.8 + ? = 10
  5. 5.55 + ? = 100
  6. 6.11 + ? = 100
  7. 7.3 + ? = 10
  8. 8.1 + ? = 10
  9. 9.2 + ? = 10
  10. 10.24 + ? = 100
  11. 11.84 + ? = 100
  12. 12.7 + ? = 10
  13. 13.31 + ? = 100
  14. 14.5 + ? = 10
  15. 15.17 + ? = 100
  16. 16.76 + ? = 100
  17. 17.57 + ? = 100
  18. 18.49 + ? = 100
  19. 19.30 + ? = 100
  20. 20.77 + ? = 100
  21. 21.26 + ? = 100
  22. 22.20 + ? = 100
  23. 23.79 + ? = 100
  24. 24.70 + ? = 100
  25. 25.53 + ? = 100
  26. 26.15 + ? = 100
  27. 27.89 + ? = 100
  28. 28.68 + ? = 100
  29. 29.40 + ? = 100
  30. 30.56 + ? = 100
  31. 31.6 + ? = 10
  32. 32.25 + ? = 100
  33. 33.28 + ? = 100
  34. 34.82 + ? = 100
  35. 35.46 + ? = 100
  36. 36.80 + ? = 100
  37. 37.81 + ? = 100
  38. 38.47 + ? = 100
  39. 39.74 + ? = 100
  40. 40.32 + ? = 100

Answer key

  1. 1
  2. 15
  3. 6
  4. 2
  5. 45
  6. 89
  7. 7
  8. 9
  9. 8
  10. 76
  11. 16
  12. 3
  13. 69
  14. 5
  15. 83
  16. 24
  17. 43
  18. 51
  19. 70
  20. 23
  21. 74
  22. 80
  23. 21
  24. 30
  25. 47
  26. 85
  27. 11
  28. 32
  29. 60
  30. 44
  31. 4
  32. 75
  33. 72
  34. 18
  35. 54
  36. 20
  37. 19
  38. 53
  39. 26
  40. 68

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